1N4745A BK PBFREE

Overview

The Central Semiconductor Corp 1N4745A BK PBFREE is a silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 16 V with a tolerance of ±5%. The device supports a maximum steady-state power dissipation of 1 W and operates within an extended temperature range from -65 °C to +200 °C. Packaged in the DO-41 axial through-hole format, it exhibits a maximum reverse leakage current of 5 µA and a Zener impedance of 16 Ohms at the specified test current.

Feature Summary

• Hermetically sealed glass construction for environmental stability
• Extended operating temperature range up to +200 °C
• Low reverse leakage current characteristics
• Standard axial leaded package for through-hole mounting

Applications

• Voltage reference circuits requiring stable DC levels
• Overvoltage protection in power supply inputs
• Clamping applications in signal processing paths
• General-purpose voltage regulation in industrial equipment

Procurement Notes

Verify the specific suffix BK against the manufacturer's official documentation to confirm packaging details and compliance status. Ensure the procurement channel provides valid RoHS certification records. Cross-reference the part number with the latest datasheet revision to confirm electrical parameters match design requirements before finalizing orders.

Selection Notes

Select this component when a robust 16 V regulation point is required in high-temperature environments. The DO-41 package facilitates easy integration into standard printed circuit board layouts. Consider the 1 W power rating for thermal management calculations under continuous load conditions. Verify compatibility with existing circuit impedance constraints given the 16 Ohm Zener impedance specification.

Part Context

This component belongs to the 1N47xxA series of hermetically sealed glass Zener diodes manufactured by Central Semiconductor. The series offers various voltage options within a standardized axial package. These devices are engineered for reliability in demanding electronic applications where consistent voltage regulation is critical across wide temperature variations.

Replacement Considerations

Direct substitutes include the onsemi 1N4745A and Fairchild 1N4745A_T50A, which share identical electrical specifications and package dimensions. Verify pinout compatibility and thermal derating curves when transitioning between manufacturers to ensure circuit performance remains within acceptable limits.